assertion  retraction  graph  subject       predicate        object   datatype    annotation
1          0           graph  DOID:2529     rdfs:subClassOf  DOID:75  _IRI        
1          0           graph  DOID:533      rdfs:subClassOf  DOID:75  _IRI        
1          0           graph  DOID:0060073  rdfs:subClassOf  DOID:75  _IRI        
1          0           graph  DOID:9942     rdfs:subClassOf  DOID:75  _IRI        
1          0           graph  DOID:75       oio:id           DOID:75  xsd:string